【摘要】 根据西昌市海河沿岸地区的地质环境,选取21个工程场地的钻孔资料,运用一维土层地震反应程序计算其峰值加速度与峰值速度。依照中国GB5001-2001规范和美国FEMA-NE-HRP规范确定了特征周期与平台值,经过加速度反应谱归一化,进而得到该场地在50年超越概率水平为63%、10%和3%的设计反应谱。结果表明,土层软硬程度对地震动加速度的幅值和频谱影响显著,软土场地对峰值加速度的放大倍数较高,且加速度反应谱谱形较宽。更多还原

【Abstract】 According to the geological environment of the coastal areas of the Haihe in Xichang city,21 boreholes date of the engineering site were selected and counted by the soil seismic response procedures.Characteristic periods and platform values were confirmed by the Chinese GB5001-201 code and recommended provisions of HEHRP.This paper provided the design response spectrums of exceeding probability of 63%,10% and 3% in future 50 years.The results showed that the amplitude and spectrum of ground motion acceleration were obvious influenced by the hardness of the engineering site.The soft site could be expanded the amplification of the peak acceleration and be widened the acceleration response spectrum.更多还原